import 'dart:async';
import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_hbb/common/widgets/setting_widgets.dart';
import 'package:get/get.dart';
import 'package:provider/provider.dart';
import 'package:settings_ui/settings_ui.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:url_launcher/url_launcher_string.dart';

import '../../common.dart';
import '../../common/widgets/dialog.dart';
import '../../common/widgets/login.dart';
import '../../consts.dart';
import '../../models/model.dart';
import '../../models/platform_model.dart';
import '../widgets/dialog.dart';
import 'home_page.dart';
import 'scan_page.dart';

class SettingsPage extends StatefulWidget implements PageShape {
  @override
  final title = translate("Settings");

  @override
  final icon = Icon(Icons.settings);

  @override
  final appBarActions = bind.isDisableSettings() ? [] : [ScanButton()];

  @override
  State<SettingsPage> createState() => _SettingsState();
}

const url = 'https://rustdesk.com/';

enum KeepScreenOn {
  never,
  duringControlled,
  serviceOn,
}

String _keepScreenOnToOption(KeepScreenOn value) {
  switch (value) {
    case KeepScreenOn.never:
      return 'never';
    case KeepScreenOn.duringControlled:
      return 'during-controlled';
    case KeepScreenOn.serviceOn:
      return 'service-on';
  }
}

KeepScreenOn optionToKeepScreenOn(String value) {
  switch (value) {
    case 'never':
      return KeepScreenOn.never;
    case 'service-on':
      return KeepScreenOn.serviceOn;
    default:
      return KeepScreenOn.duringControlled;
  }
}

class _SettingsState extends State<SettingsPage> with WidgetsBindingObserver {
  final _hasIgnoreBattery =
      false; //androidVersion >= 26; // remove because not work on every device
  var _ignoreBatteryOpt = false;
  var _enableStartOnBoot = false;
  var _floatingWindowDisabled = false;
  var _keepScreenOn = KeepScreenOn.duringControlled; // relay on floating window
  var _enableAbr = false;
  var _denyLANDiscovery = false;
  var _onlyWhiteList = false;
  var _enableDirectIPAccess = false;
  var _enableRecordSession = false;
  var _enableHardwareCodec = false;
  var _autoRecordIncomingSession = false;
  var _allowAutoDisconnect = false;
  var _localIP = "";
  var _directAccessPort = "";
  var _fingerprint = "";
  var _buildDate = "";
  var _autoDisconnectTimeout = "";

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);

    _enableAbr = option2bool(
        kOptionEnableAbr, bind.mainGetOptionSync(key: kOptionEnableAbr));
    _denyLANDiscovery = !option2bool(kOptionEnableLanDiscovery,
        bind.mainGetOptionSync(key: kOptionEnableLanDiscovery));
    _onlyWhiteList = (bind.mainGetOptionSync(key: kOptionWhitelist)) !=
        defaultOptionWhitelist;
    _enableDirectIPAccess = option2bool(
        kOptionDirectServer, bind.mainGetOptionSync(key: kOptionDirectServer));
    _enableRecordSession = option2bool(kOptionEnableRecordSession,
        bind.mainGetOptionSync(key: kOptionEnableRecordSession));
    _enableHardwareCodec = option2bool(kOptionEnableHwcodec,
        bind.mainGetOptionSync(key: kOptionEnableHwcodec));
    _autoRecordIncomingSession = option2bool(kOptionAllowAutoRecordIncoming,
        bind.mainGetOptionSync(key: kOptionAllowAutoRecordIncoming));
    _localIP = bind.mainGetOptionSync(key: 'local-ip-addr');
    _directAccessPort = bind.mainGetOptionSync(key: kOptionDirectAccessPort);
    _allowAutoDisconnect = option2bool(kOptionAllowAutoDisconnect,
        bind.mainGetOptionSync(key: kOptionAllowAutoDisconnect));
    _autoDisconnectTimeout =
        bind.mainGetOptionSync(key: kOptionAutoDisconnectTimeout);

    () async {
      var update = false;

      if (_hasIgnoreBattery) {
        if (await checkAndUpdateIgnoreBatteryStatus()) {
          update = true;
        }
      }

      if (await checkAndUpdateStartOnBoot()) {
        update = true;
      }

      // start on boot depends on ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS and SYSTEM_ALERT_WINDOW
      var enableStartOnBoot =
          await gFFI.invokeMethod(AndroidChannel.kGetStartOnBootOpt);
      if (enableStartOnBoot) {
        if (!await canStartOnBoot()) {
          enableStartOnBoot = false;
          gFFI.invokeMethod(AndroidChannel.kSetStartOnBootOpt, false);
        }
      }

      if (enableStartOnBoot != _enableStartOnBoot) {
        update = true;
        _enableStartOnBoot = enableStartOnBoot;
      }

      var floatingWindowDisabled =
          bind.mainGetLocalOption(key: kOptionDisableFloatingWindow) == "Y" ||
              !await AndroidPermissionManager.check(kSystemAlertWindow);
      if (floatingWindowDisabled != _floatingWindowDisabled) {
        update = true;
        _floatingWindowDisabled = floatingWindowDisabled;
      }

      final keepScreenOn = _floatingWindowDisabled
          ? KeepScreenOn.never
          : optionToKeepScreenOn(
              bind.mainGetLocalOption(key: kOptionKeepScreenOn));
      if (keepScreenOn != _keepScreenOn) {
        update = true;
        _keepScreenOn = keepScreenOn;
      }

      final fingerprint = await bind.mainGetFingerprint();
      if (_fingerprint != fingerprint) {
        update = true;
        _fingerprint = fingerprint;
      }

      final buildDate = await bind.mainGetBuildDate();
      if (_buildDate != buildDate) {
        update = true;
        _buildDate = buildDate;
      }
      if (update) {
        setState(() {});
      }
    }();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state == AppLifecycleState.resumed) {
      () async {
        final ibs = await checkAndUpdateIgnoreBatteryStatus();
        final sob = await checkAndUpdateStartOnBoot();
        if (ibs || sob) {
          setState(() {});
        }
      }();
    }
  }

  Future<bool> checkAndUpdateIgnoreBatteryStatus() async {
    final res = await AndroidPermissionManager.check(
        kRequestIgnoreBatteryOptimizations);
    if (_ignoreBatteryOpt != res) {
      _ignoreBatteryOpt = res;
      return true;
    } else {
      return false;
    }
  }

  Future<bool> checkAndUpdateStartOnBoot() async {
    if (!await canStartOnBoot() && _enableStartOnBoot) {
      _enableStartOnBoot = false;
      debugPrint(
          "checkAndUpdateStartOnBoot and set _enableStartOnBoot -> false");
      gFFI.invokeMethod(AndroidChannel.kSetStartOnBootOpt, false);
      return true;
    } else {
      return false;
    }
  }

  @override
  Widget build(BuildContext context) {
    Provider.of<FfiModel>(context);
    final outgoingOnly = bind.isOutgoingOnly();
    final customClientSection = CustomSettingsSection(
        child: Column(
      children: [
        if (bind.isCustomClient())
          Align(
            alignment: Alignment.center,
            child: loadPowered(context),
          ),
        Align(
          alignment: Alignment.center,
          child: loadLogo(),
        )
      ],
    ));
    final List<AbstractSettingsTile> enhancementsTiles = [];
    final List<AbstractSettingsTile> shareScreenTiles = [
      SettingsTile.switchTile(
        title: Text(translate('enable-2fa-title')),
        initialValue: bind.mainHasValid2FaSync(),
        onToggle: (_) async {
          update() async {
            setState(() {});
          }

          change2fa(callback: update);
        },
      ),
      SettingsTile.switchTile(
        title: Text(translate('Deny LAN discovery')),
        initialValue: _denyLANDiscovery,
        onToggle: isOptionFixed(kOptionEnableLanDiscovery)
            ? null
            : (v) async {
                await bind.mainSetOption(
                    key: kOptionEnableLanDiscovery,
                    value: bool2option(kOptionEnableLanDiscovery, !v));
                final newValue = !option2bool(kOptionEnableLanDiscovery,
                    await bind.mainGetOption(key: kOptionEnableLanDiscovery));
                setState(() {
                  _denyLANDiscovery = newValue;
                });
              },
      ),
      SettingsTile.switchTile(
        title: Row(children: [
          Expanded(child: Text(translate('Use IP Whitelisting'))),
          Offstage(
                  offstage: !_onlyWhiteList,
                  child: const Icon(Icons.warning_amber_rounded,
                      color: Color.fromARGB(255, 255, 204, 0)))
              .marginOnly(left: 5)
        ]),
        initialValue: _onlyWhiteList,
        onToggle: (_) async {
          update() async {
            final onlyWhiteList =
                (await bind.mainGetOption(key: kOptionWhitelist)) !=
                    defaultOptionWhitelist;
            if (onlyWhiteList != _onlyWhiteList) {
              setState(() {
                _onlyWhiteList = onlyWhiteList;
              });
            }
          }

          changeWhiteList(callback: update);
        },
      ),
      SettingsTile.switchTile(
        title: Text('${translate('Adaptive bitrate')} (beta)'),
        initialValue: _enableAbr,
        onToggle: isOptionFixed(kOptionEnableAbr)
            ? null
            : (v) async {
                await mainSetBoolOption(kOptionEnableAbr, v);
                final newValue = await mainGetBoolOption(kOptionEnableAbr);
                setState(() {
                  _enableAbr = newValue;
                });
              },
      ),
      SettingsTile.switchTile(
        title: Text(translate('Enable recording session')),
        initialValue: _enableRecordSession,
        onToggle: isOptionFixed(kOptionEnableRecordSession)
            ? null
            : (v) async {
                await mainSetBoolOption(kOptionEnableRecordSession, v);
                final newValue =
                    await mainGetBoolOption(kOptionEnableRecordSession);
                setState(() {
                  _enableRecordSession = newValue;
                });
              },
      ),
      SettingsTile.switchTile(
        title: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Expanded(
                  child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                    Text(translate("Direct IP Access")),
                    Offstage(
                        offstage: !_enableDirectIPAccess,
                        child: Text(
                          '${translate("Local Address")}: $_localIP${_directAccessPort.isEmpty ? "" : ":$_directAccessPort"}',
                          style: Theme.of(context).textTheme.bodySmall,
                        )),
                  ])),
              Offstage(
                  offstage: !_enableDirectIPAccess,
                  child: IconButton(
                      padding: EdgeInsets.zero,
                      icon: Icon(
                        Icons.edit,
                        size: 20,
                      ),
                      onPressed: isOptionFixed(kOptionDirectAccessPort)
                          ? null
                          : () async {
                              final port = await changeDirectAccessPort(
                                  _localIP, _directAccessPort);
                              setState(() {
                                _directAccessPort = port;
                              });
                            }))
            ]),
        initialValue: _enableDirectIPAccess,
        onToggle: isOptionFixed(kOptionDirectServer)
            ? null
            : (_) async {
                _enableDirectIPAccess = !_enableDirectIPAccess;
                String value =
                    bool2option(kOptionDirectServer, _enableDirectIPAccess);
                await bind.mainSetOption(
                    key: kOptionDirectServer, value: value);
                setState(() {});
              },
      ),
      SettingsTile.switchTile(
        title: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Expanded(
                  child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                    Text(translate("auto_disconnect_option_tip")),
                    Offstage(
                        offstage: !_allowAutoDisconnect,
                        child: Text(
                          '${_autoDisconnectTimeout.isEmpty ? '10' : _autoDisconnectTimeout} min',
                          style: Theme.of(context).textTheme.bodySmall,
                        )),
                  ])),
              Offstage(
                  offstage: !_allowAutoDisconnect,
                  child: IconButton(
                      padding: EdgeInsets.zero,
                      icon: Icon(
                        Icons.edit,
                        size: 20,
                      ),
                      onPressed: isOptionFixed(kOptionAutoDisconnectTimeout)
                          ? null
                          : () async {
                              final timeout = await changeAutoDisconnectTimeout(
                                  _autoDisconnectTimeout);
                              setState(() {
                                _autoDisconnectTimeout = timeout;
                              });
                            }))
            ]),
        initialValue: _allowAutoDisconnect,
        onToggle: isOptionFixed(kOptionAllowAutoDisconnect)
            ? null
            : (_) async {
                _allowAutoDisconnect = !_allowAutoDisconnect;
                String value = bool2option(
                    kOptionAllowAutoDisconnect, _allowAutoDisconnect);
                await bind.mainSetOption(
                    key: kOptionAllowAutoDisconnect, value: value);
                setState(() {});
              },
      )
    ];
    if (_hasIgnoreBattery) {
      enhancementsTiles.insert(
          0,
          SettingsTile.switchTile(
              initialValue: _ignoreBatteryOpt,
              title: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(translate('Keep RustDesk background service')),
                    Text('* ${translate('Ignore Battery Optimizations')}',
                        style: Theme.of(context).textTheme.bodySmall),
                  ]),
              onToggle: (v) async {
                if (v) {
                  await AndroidPermissionManager.request(
                      kRequestIgnoreBatteryOptimizations);
                } else {
                  final res = await gFFI.dialogManager.show<bool>(
                      (setState, close, context) => CustomAlertDialog(
                            title: Text(translate("Open System Setting")),
                            content: Text(translate(
                                "android_open_battery_optimizations_tip")),
                            actions: [
                              dialogButton("Cancel",
                                  onPressed: () => close(), isOutline: true),
                              dialogButton(
                                "Open System Setting",
                                onPressed: () => close(true),
                              ),
                            ],
                          ));
                  if (res == true) {
                    AndroidPermissionManager.startAction(
                        kActionApplicationDetailsSettings);
                  }
                }
              }));
    }
    enhancementsTiles.add(SettingsTile.switchTile(
        initialValue: _enableStartOnBoot,
        title: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
          Text("${translate('Start on boot')} (beta)"),
          Text(
              '* ${translate('Start the screen sharing service on boot, requires special permissions')}',
              style: Theme.of(context).textTheme.bodySmall),
        ]),
        onToggle: (toValue) async {
          if (toValue) {
            // 1. request kIgnoreBatteryOptimizations
            if (!await AndroidPermissionManager.check(
                kRequestIgnoreBatteryOptimizations)) {
              if (!await AndroidPermissionManager.request(
                  kRequestIgnoreBatteryOptimizations)) {
                return;
              }
            }

            // 2. request kSystemAlertWindow
            if (!await AndroidPermissionManager.check(kSystemAlertWindow)) {
              if (!await AndroidPermissionManager.request(kSystemAlertWindow)) {
                return;
              }
            }

            // (Optional) 3. request input permission
          }
          setState(() => _enableStartOnBoot = toValue);

          gFFI.invokeMethod(AndroidChannel.kSetStartOnBootOpt, toValue);
        }));

    onFloatingWindowChanged(bool toValue) async {
      if (toValue) {
        if (!await AndroidPermissionManager.check(kSystemAlertWindow)) {
          if (!await AndroidPermissionManager.request(kSystemAlertWindow)) {
            return;
          }
        }
      }
      final disable = !toValue;
      bind.mainSetLocalOption(
          key: kOptionDisableFloatingWindow,
          value: disable ? 'Y' : defaultOptionNo);
      setState(() => _floatingWindowDisabled = disable);
      gFFI.serverModel.androidUpdatekeepScreenOn();
    }

    enhancementsTiles.add(SettingsTile.switchTile(
        initialValue: !_floatingWindowDisabled,
        title: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
          Text(translate('Floating window')),
          Text('* ${translate('floating_window_tip')}',
              style: Theme.of(context).textTheme.bodySmall),
        ]),
        onToggle: bind.mainIsOptionFixed(key: kOptionDisableFloatingWindow)
            ? null
            : onFloatingWindowChanged));

    enhancementsTiles.add(_getPopupDialogRadioEntry(
      title: 'Keep screen on',
      list: [
        _RadioEntry('Never', _keepScreenOnToOption(KeepScreenOn.never)),
        _RadioEntry('During controlled',
            _keepScreenOnToOption(KeepScreenOn.duringControlled)),
        _RadioEntry('During service is on',
            _keepScreenOnToOption(KeepScreenOn.serviceOn)),
      ],
      getter: () => _keepScreenOnToOption(_floatingWindowDisabled
          ? KeepScreenOn.never
          : optionToKeepScreenOn(
              bind.mainGetLocalOption(key: kOptionKeepScreenOn))),
      asyncSetter: isOptionFixed(kOptionKeepScreenOn) || _floatingWindowDisabled
          ? null
          : (value) async {
              await bind.mainSetLocalOption(
                  key: kOptionKeepScreenOn, value: value);
              setState(() => _keepScreenOn = optionToKeepScreenOn(value));
              gFFI.serverModel.androidUpdatekeepScreenOn();
            },
    ));

    final disabledSettings = bind.isDisableSettings();
    final settings = SettingsList(
      sections: [
        customClientSection,
        if (!bind.isDisableAccount())
          SettingsSection(
            title: Text(translate('Account')),
            tiles: [
              SettingsTile(
                title: Obx(() => Text(gFFI.userModel.userName.value.isEmpty
                    ? translate('Login')
                    : '${translate('Logout')} (${gFFI.userModel.userName.value})')),
                leading: Icon(Icons.person),
                onPressed: (context) {
                  if (gFFI.userModel.userName.value.isEmpty) {
                    loginDialog();
                  } else {
                    logOutConfirmDialog();
                  }
                },
              ),
            ],
          ),
        SettingsSection(title: Text(translate("Settings")), tiles: [
          if (!disabledSettings)
            SettingsTile(
                title: Text(translate('ID/Relay Server')),
                leading: Icon(Icons.cloud),
                onPressed: (context) {
                  showServerSettings(gFFI.dialogManager);
                }),
          SettingsTile(
              title: Text(translate('Language')),
              leading: Icon(Icons.translate),
              onPressed: (context) {
                showLanguageSettings(gFFI.dialogManager);
              }),
          SettingsTile(
            title: Text(translate(
                Theme.of(context).brightness == Brightness.light
                    ? 'Dark Theme'
                    : 'Light Theme')),
            leading: Icon(Theme.of(context).brightness == Brightness.light
                ? Icons.dark_mode
                : Icons.light_mode),
            onPressed: (context) {
              showThemeSettings(gFFI.dialogManager);
            },
          )
        ]),
        if (isAndroid)
          SettingsSection(title: Text(translate('Hardware Codec')), tiles: [
            SettingsTile.switchTile(
              title: Text(translate('Enable hardware codec')),
              initialValue: _enableHardwareCodec,
              onToggle: isOptionFixed(kOptionEnableHwcodec)
                  ? null
                  : (v) async {
                      await mainSetBoolOption(kOptionEnableHwcodec, v);
                      final newValue =
                          await mainGetBoolOption(kOptionEnableHwcodec);
                      setState(() {
                        _enableHardwareCodec = newValue;
                      });
                    },
            ),
          ]),
        if (isAndroid && !outgoingOnly)
          SettingsSection(
            title: Text(translate("Recording")),
            tiles: [
              SettingsTile.switchTile(
                title:
                    Text(translate('Automatically record incoming sessions')),
                leading: Icon(Icons.videocam),
                description: Text(
                    "${translate("Directory")}: ${bind.mainVideoSaveDirectory(root: false)}"),
                initialValue: _autoRecordIncomingSession,
                onToggle: isOptionFixed(kOptionAllowAutoRecordIncoming)
                    ? null
                    : (v) async {
                        await bind.mainSetOption(
                            key: kOptionAllowAutoRecordIncoming,
                            value:
                                bool2option(kOptionAllowAutoRecordIncoming, v));
                        final newValue = option2bool(
                            kOptionAllowAutoRecordIncoming,
                            await bind.mainGetOption(
                                key: kOptionAllowAutoRecordIncoming));
                        setState(() {
                          _autoRecordIncomingSession = newValue;
                        });
                      },
              ),
            ],
          ),
        if (isAndroid && !disabledSettings && !outgoingOnly)
          SettingsSection(
            title: Text(translate("Share Screen")),
            tiles: shareScreenTiles,
          ),
        if (!bind.isIncomingOnly()) defaultDisplaySection(),
        if (isAndroid && !disabledSettings && !outgoingOnly)
          SettingsSection(
            title: Text(translate("Enhancements")),
            tiles: enhancementsTiles,
          ),
        SettingsSection(
          title: Text(translate("About")),
          tiles: [
            SettingsTile(
                onPressed: (context) async {
                  if (await canLaunchUrl(Uri.parse(url))) {
                    await launchUrl(Uri.parse(url));
                  }
                },
                title: Text(translate("Version: ") + version),
                value: Padding(
                  padding: EdgeInsets.symmetric(vertical: 8),
                  child: Text('rustdesk.com',
                      style: TextStyle(
                        decoration: TextDecoration.underline,
                      )),
                ),
                leading: Icon(Icons.info)),
            SettingsTile(
                title: Text(translate("Build Date")),
                value: Padding(
                  padding: EdgeInsets.symmetric(vertical: 8),
                  child: Text(_buildDate),
                ),
                leading: Icon(Icons.query_builder)),
            if (isAndroid)
              SettingsTile(
                  onPressed: (context) => onCopyFingerprint(_fingerprint),
                  title: Text(translate("Fingerprint")),
                  value: Padding(
                    padding: EdgeInsets.symmetric(vertical: 8),
                    child: Text(_fingerprint),
                  ),
                  leading: Icon(Icons.fingerprint)),
            SettingsTile(
              title: Text(translate("Privacy Statement")),
              onPressed: (context) =>
                  launchUrlString('https://rustdesk.com/privacy.html'),
              leading: Icon(Icons.privacy_tip),
            )
          ],
        ),
      ],
    );
    return settings;
  }

  Future<bool> canStartOnBoot() async {
    // start on boot depends on ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS and SYSTEM_ALERT_WINDOW
    if (_hasIgnoreBattery && !_ignoreBatteryOpt) {
      return false;
    }
    if (!await AndroidPermissionManager.check(kSystemAlertWindow)) {
      return false;
    }
    return true;
  }

  defaultDisplaySection() {
    return SettingsSection(
      title: Text(translate("Display Settings")),
      tiles: [
        SettingsTile(
            title: Text(translate('Display Settings')),
            leading: Icon(Icons.desktop_windows_outlined),
            trailing: Icon(Icons.arrow_forward_ios),
            onPressed: (context) {
              Navigator.push(context, MaterialPageRoute(builder: (context) {
                return _DisplayPage();
              }));
            })
      ],
    );
  }
}

void showServerSettings(OverlayDialogManager dialogManager) async {
  Map<String, dynamic> options = jsonDecode(await bind.mainGetOptions());
  showServerSettingsWithValue(ServerConfig.fromOptions(options), dialogManager);
}

void showLanguageSettings(OverlayDialogManager dialogManager) async {
  try {
    final langs = json.decode(await bind.mainGetLangs()) as List<dynamic>;
    var lang = bind.mainGetLocalOption(key: kCommConfKeyLang);
    dialogManager.show((setState, close, context) {
      setLang(v) async {
        if (lang != v) {
          setState(() {
            lang = v;
          });
          await bind.mainSetLocalOption(key: kCommConfKeyLang, value: v);
          HomePage.homeKey.currentState?.refreshPages();
          Future.delayed(Duration(milliseconds: 200), close);
        }
      }

      final isOptFixed = isOptionFixed(kCommConfKeyLang);
      return CustomAlertDialog(
        content: Column(
          children: [
                getRadio(Text(translate('Default')), defaultOptionLang, lang,
                    isOptFixed ? null : setLang),
                Divider(color: MyTheme.border),
              ] +
              langs.map((e) {
                final key = e[0] as String;
                final name = e[1] as String;
                return getRadio(Text(translate(name)), key, lang,
                    isOptFixed ? null : setLang);
              }).toList(),
        ),
      );
    }, backDismiss: true, clickMaskDismiss: true);
  } catch (e) {
    //
  }
}

void showThemeSettings(OverlayDialogManager dialogManager) async {
  var themeMode = MyTheme.getThemeModePreference();

  dialogManager.show((setState, close, context) {
    setTheme(v) {
      if (themeMode != v) {
        setState(() {
          themeMode = v;
        });
        MyTheme.changeDarkMode(themeMode);
        Future.delayed(Duration(milliseconds: 200), close);
      }
    }

    final isOptFixed = isOptionFixed(kCommConfKeyTheme);
    return CustomAlertDialog(
      content: Column(children: [
        getRadio(Text(translate('Light')), ThemeMode.light, themeMode,
            isOptFixed ? null : setTheme),
        getRadio(Text(translate('Dark')), ThemeMode.dark, themeMode,
            isOptFixed ? null : setTheme),
        getRadio(Text(translate('Follow System')), ThemeMode.system, themeMode,
            isOptFixed ? null : setTheme)
      ]),
    );
  }, backDismiss: true, clickMaskDismiss: true);
}

void showAbout(OverlayDialogManager dialogManager) {
  dialogManager.show((setState, close, context) {
    return CustomAlertDialog(
      title: Text('${translate('About')} RustDesk'),
      content: Wrap(direction: Axis.vertical, spacing: 12, children: [
        Text('Version: $version'),
        InkWell(
            onTap: () async {
              const url = 'https://rustdesk.com/';
              if (await canLaunchUrl(Uri.parse(url))) {
                await launchUrl(Uri.parse(url));
              }
            },
            child: Padding(
              padding: EdgeInsets.symmetric(vertical: 8),
              child: Text('rustdesk.com',
                  style: TextStyle(
                    decoration: TextDecoration.underline,
                  )),
            )),
      ]),
      actions: [],
    );
  }, clickMaskDismiss: true, backDismiss: true);
}

class ScanButton extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return IconButton(
      icon: Icon(Icons.qr_code_scanner),
      onPressed: () {
        Navigator.push(
          context,
          MaterialPageRoute(
            builder: (BuildContext context) => ScanPage(),
          ),
        );
      },
    );
  }
}

class _DisplayPage extends StatefulWidget {
  const _DisplayPage();

  @override
  State<_DisplayPage> createState() => __DisplayPageState();
}

class __DisplayPageState extends State<_DisplayPage> {
  @override
  Widget build(BuildContext context) {
    final Map codecsJson = jsonDecode(bind.mainSupportedHwdecodings());
    final h264 = codecsJson['h264'] ?? false;
    final h265 = codecsJson['h265'] ?? false;
    var codecList = [
      _RadioEntry('Auto', 'auto'),
      _RadioEntry('VP8', 'vp8'),
      _RadioEntry('VP9', 'vp9'),
      _RadioEntry('AV1', 'av1'),
      if (h264) _RadioEntry('H264', 'h264'),
      if (h265) _RadioEntry('H265', 'h265')
    ];
    RxBool showCustomImageQuality = false.obs;
    return Scaffold(
      appBar: AppBar(
        leading: IconButton(
            onPressed: () => Navigator.pop(context),
            icon: Icon(Icons.arrow_back_ios)),
        title: Text(translate('Display Settings')),
        centerTitle: true,
      ),
      body: SettingsList(sections: [
        SettingsSection(
          tiles: [
            _getPopupDialogRadioEntry(
              title: 'Default View Style',
              list: [
                _RadioEntry('Scale original', kRemoteViewStyleOriginal),
                _RadioEntry('Scale adaptive', kRemoteViewStyleAdaptive)
              ],
              getter: () =>
                  bind.mainGetUserDefaultOption(key: kOptionViewStyle),
              asyncSetter: isOptionFixed(kOptionViewStyle)
                  ? null
                  : (value) async {
                      await bind.mainSetUserDefaultOption(
                          key: kOptionViewStyle, value: value);
                    },
            ),
            _getPopupDialogRadioEntry(
              title: 'Default Image Quality',
              list: [
                _RadioEntry('Good image quality', kRemoteImageQualityBest),
                _RadioEntry('Balanced', kRemoteImageQualityBalanced),
                _RadioEntry('Optimize reaction time', kRemoteImageQualityLow),
                _RadioEntry('Custom', kRemoteImageQualityCustom),
              ],
              getter: () {
                final v =
                    bind.mainGetUserDefaultOption(key: kOptionImageQuality);
                showCustomImageQuality.value = v == kRemoteImageQualityCustom;
                return v;
              },
              asyncSetter: isOptionFixed(kOptionImageQuality)
                  ? null
                  : (value) async {
                      await bind.mainSetUserDefaultOption(
                          key: kOptionImageQuality, value: value);
                      showCustomImageQuality.value =
                          value == kRemoteImageQualityCustom;
                    },
              tail: customImageQualitySetting(),
              showTail: showCustomImageQuality,
              notCloseValue: kRemoteImageQualityCustom,
            ),
            _getPopupDialogRadioEntry(
              title: 'Default Codec',
              list: codecList,
              getter: () =>
                  bind.mainGetUserDefaultOption(key: kOptionCodecPreference),
              asyncSetter: isOptionFixed(kOptionCodecPreference)
                  ? null
                  : (value) async {
                      await bind.mainSetUserDefaultOption(
                          key: kOptionCodecPreference, value: value);
                    },
            ),
          ],
        ),
        SettingsSection(
          title: Text(translate('Other Default Options')),
          tiles:
              otherDefaultSettings().map((e) => otherRow(e.$1, e.$2)).toList(),
        ),
      ]),
    );
  }

  SettingsTile otherRow(String label, String key) {
    final value = bind.mainGetUserDefaultOption(key: key) == 'Y';
    final isOptFixed = isOptionFixed(key);
    return SettingsTile.switchTile(
      initialValue: value,
      title: Text(translate(label)),
      onToggle: isOptFixed
          ? null
          : (b) async {
              await bind.mainSetUserDefaultOption(
                  key: key, value: b ? 'Y' : defaultOptionNo);
              setState(() {});
            },
    );
  }
}

class _RadioEntry {
  final String label;
  final String value;
  _RadioEntry(this.label, this.value);
}

typedef _RadioEntryGetter = String Function();
typedef _RadioEntrySetter = Future<void> Function(String);

SettingsTile _getPopupDialogRadioEntry({
  required String title,
  required List<_RadioEntry> list,
  required _RadioEntryGetter getter,
  required _RadioEntrySetter? asyncSetter,
  Widget? tail,
  RxBool? showTail,
  String? notCloseValue,
}) {
  RxString groupValue = ''.obs;
  RxString valueText = ''.obs;

  init() {
    groupValue.value = getter();
    final e = list.firstWhereOrNull((e) => e.value == groupValue.value);
    if (e != null) {
      valueText.value = e.label;
    }
  }

  init();

  void showDialog() async {
    gFFI.dialogManager.show((setState, close, context) {
      final onChanged = asyncSetter == null
          ? null
          : (String? value) async {
              if (value == null) return;
              await asyncSetter(value);
              init();
              if (value != notCloseValue) {
                close();
              }
            };

      return CustomAlertDialog(
          content: Obx(
        () => Column(children: [
          ...list
              .map((e) => getRadio(Text(translate(e.label)), e.value,
                  groupValue.value, onChanged))
              .toList(),
          Offstage(
            offstage:
                !(tail != null && showTail != null && showTail.value == true),
            child: tail,
          ),
        ]),
      ));
    }, backDismiss: true, clickMaskDismiss: true);
  }

  return SettingsTile(
    title: Text(translate(title)),
    onPressed: asyncSetter == null ? null : (context) => showDialog(),
    value: Padding(
      padding: EdgeInsets.symmetric(vertical: 8),
      child: Obx(() => Text(translate(valueText.value))),
    ),
  );
}